package com.lyd.blog.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

//MD5加密
public class MD5Utils {

    /**
     * MD5加密类
     *
     * @param str 要加密的字符串
     * @return 加密后的字符串
     */
    public static String code(String str) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest=md.digest();
            int i;
            StringBuffer buffer=new StringBuffer("");
            for (int offset=0;offset<byteDigest.length;offset++){
                i=byteDigest[offset];
                if (i<0)
                    i+=256;
                if (i<16)
                    buffer.append("0");
                buffer.append(Integer.toHexString(i));
            }
            //32位加密
            return buffer.toString();

            //16为的加密
            //return buffer.toString().substring(8,24);

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;

        }
    }

    public static void main(String[] args) {
        System.out.println(code("18750055069lyd"));
    }

}
